package com.yunqiao.api.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * jwt工具类
 *
 * @author Crocutax
 * @email wangxw725@163.com
 * @date 2017/9/21 22:21
 */
@ConfigurationProperties(prefix = "yunqiao.jwt")
@Component
public class JwtUtils {
    private Logger logger = LoggerFactory.getLogger(getClass());
    public static final String TOKEN_SEPARATOR = "-";

    private String secret;
    private long expire;
    private String header;

    /**
     * 生成jwt token
     */
    public String generateToken(int roleType,long userId) {
        Date nowDate = new Date();
        //过期时间
        Date expireDate = new Date(nowDate.getTime() + expire * 1000);

        return Jwts.builder()
            .setHeaderParam("typ", "JWT")
            //角色类型-用户ID,方便LoginUser注解的使用
            .setSubject(String.valueOf(userId))   //1.单表账号
            //.setSubject(roleType + TOKEN_SEPARATOR + userId)   //2.多表账号,放分隔符,为了根据角色去对应的表里查询
            .setIssuedAt(nowDate)
            .setExpiration(expireDate)
            .signWith(SignatureAlgorithm.HS512, secret)
            .compact();
    }

    public Claims getClaimByToken(String token) {
        try {
            return Jwts.parser()
                .setSigningKey(secret)
                .parseClaimsJws(token)
                .getBody();
        } catch (Exception e) {
            logger.debug("validate is token error ", e);
            return null;
        }
    }

    /**
     * token是否过期
     *
     * @return true：过期
     */
    public boolean isTokenExpired(Date expiration) {
        return expiration.before(new Date());
    }

    public String getSecret() {
        return secret;
    }

    public void setSecret(String secret) {
        this.secret = secret;
    }

    public long getExpire() {
        return expire;
    }

    public void setExpire(long expire) {
        this.expire = expire;
    }

    public String getHeader() {
        return header;
    }

    public void setHeader(String header) {
        this.header = header;
    }
}
